2017 Mercedes-Benz SL 5.5L Petrol · SL63 RAM

The vehicle most recently passed its MOT on 8 July 2026 with no defects or advisories recorded, continuing an unbroken run of clean test passes stretching back to 2020. With seven consecutive passes and zero advisories, failures, or recurring component issues over the entire recorded test history, the official DVSA data reflects a very stable maintenance trend. The absence of any documented defects relating to braking performance, suspension condition, lighting, tyres, or exhaust emissions over multiple test cycles suggests that the vehicle has been kept in consistently roadworthy condition, or at minimum that any wear items have been rectified before reaching advisory threshold. For a buyer, this is a reassuring baseline, although it should be noted that MOT testing only represents a snapshot of the components inspected on the day and does not cover many items relevant to a high-performance luxury convertible of this age and value. The recorded mileage of 20,859 miles against an age of approximately nine years equates to an average annual usage of just 2,318 miles, which is substantially below the national average and indicates either predominantly light recreational use or extended periods of standing. Such low annual mileage is not necessarily detrimental in mechanical terms for major drivetrain components, but it does raise specific concerns associated with vehicles that are stored or used infrequently. Infrequent use can accelerate degradation of certain consumables and can allow corrosion to take hold on brake discs, callipers, and underbody surfaces, while fluids can degrade on a calendar basis regardless of mileage covered. For a prospective buyer, several physical checks are strongly advised given the low-mileage profile and the vehicle's convertible bodystyle. Tyres should be inspected for sidewall perishing and cracking, as rubber compounds deteriorate with age even when tread depth remains adequate, and a nine-year-old set of tyres should be considered for replacement on age alone regardless of wear. The brake system warrants close examination, including the discs for surface corrosion and the callipers for any signs of binding or seizure caused by infrequent operation, which on a test drive would typically manifest as pulling to one side, uneven braking effort, or a handbrake that fails to release cleanly. The 12V battery should be load tested, as prolonged standing combined with parasitic drain is a common cause of premature battery failure in low-use vehicles, and the convertible roof mechanism, hood seals, and hood hydraulic fluid should be inspected for leaks and proper function, particularly given that Mercedes SL fabric roofs can be expensive to repair if allowed to deteriorate. Beyond these immediate checks, a pre-purchase inspection by a specialist familiar with Mercedes-Benz vehicles is highly recommended, with particular attention to time-based servicing items. Engine oil, transmission fluid, brake fluid, and coolant should all be checked for age and condition, as these degrade chemically over time regardless of mileage and can lead to internal corrosion or reduced protection if neglected. Any evidence of regular annual servicing, even at low mileage, would be a strong positive indicator, and the service book should be examined for consistent stamps. Finally, on a road test, listen for any suspension clonks over uneven surfaces, check for fluid leaks beneath the vehicle after it has been parked, and verify that all electronic systems, including the ABC active suspension warning system if fitted, operate without warning messages, as these are areas that may not be captured by an MOT but are critical to the long-term integrity and value of the vehicle.